Ecological Labs MLBBG4 1-Gallon Microbe-Lift Bio-Blue Specially formulated to safely color lakes, lagoons, decorative ponds, fountains and water features a beautiful shade of Blue Two products that safely color water while their enzymes assist the beneficial bacteria in your pond to create a healthy pond Will not stain birds, fish, pond rocks or most concrete fountains once diluted 1 GALLON Treats 64,000 gallons Use 2 oz. per 1,000 gallon pond Safe for humans, plants and aquatic life Mixes completely in hours